With the advent of the Fifth Grail War Fuyuki City stands paralyzed in the face of a rash of comas and murders. What if the city council decided to do something about this? Their decision is to call on one Ranma Saotome to deal with the situation.

Ranma fell in a special spring at Jusenkyo and soon, he was summoned as a Servant by Sakura Mato. Hoping to cure his curse with the wish granting Holy Grail, he decides to help the girl that brought him to Fuyuki city to win the War.